CN209892722U - Pre-tightening spacer bush for driving bevel gear assembly of automobile drive axle - Google Patents
Pre-tightening spacer bush for driving bevel gear assembly of automobile drive axle Download PDFInfo
- Publication number
- CN209892722U CN209892722U CN201920519851.5U CN201920519851U CN209892722U CN 209892722 U CN209892722 U CN 209892722U CN 201920519851 U CN201920519851 U CN 201920519851U CN 209892722 U CN209892722 U CN 209892722U
- Authority
- CN
- China
- Prior art keywords
- wall
- circular
- bevel gear
- groove
- sleeve body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 47
- 230000004323 axial length Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 239000003638 chemical reducing agent Substances 0.000 description 8
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 230000009347 mechanical transmission Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
Landscapes
- Support Of The Bearing (AREA)
Abstract
The utility model discloses a pretension spacer bush for a drive bevel gear assembly of an automobile drive axle, which comprises a circular tube sleeve body, wherein the axial length of the circular tube sleeve body is less than 30mm, an inner wall circular groove is arranged on the inner wall of the circular tube sleeve body, and the inner wall circular groove is vertical to the axial direction of the circular tube sleeve body; the outer wall of the circular pipe sleeve body is provided with an upper circular groove and a lower circular groove, and the upper circular groove and the lower circular groove are respectively positioned on the upper side and the lower side of the outer wall of the circular pipe sleeve body. The utility model discloses a pretension spacer for automobile drive axle initiative bevel gear assembly adopts this pretension spacer to replace existing rigidity ripple cover to come to carry out the pretension to the main cone assembly bearing, has improved the effect of lock nut pretension main cone assembly, relapse the dismouting when can avoiding the assembly of main cone assembly, the process of changing the gasket, directly improves the assembly efficiency of main cone assembly.
Description
Technical Field
The utility model belongs to the technical field of mechanical transmission, concretely relates to pretension spacer sleeve for automobile drive axle drive bevel gear assembly.
Background
The drive axle is a main component of a transmission system of a commercial vehicle, generally comprises a main speed reducer, a differential mechanism, a wheel transmission device, a drive axle housing and the like, and is a mechanism component for reducing speed, increasing torque and transmitting power transmitted by a transmission shaft to a tire. The main reducer is an important component of a drive axle and comprises a driving bevel gear assembly (called a main bevel assembly for short) and a driven bevel gear assembly, and the input speed of a transmission shaft can be reduced and the torque can be correspondingly increased. Fig. 1 is a schematic diagram of an internal structure of a driving bevel gear assembly pre-tightened by a rigid spacer in the prior art, wherein a flange 10 is in spline fit with a transmission shaft and used for inputting power to a drive axle, and a flange 11 is fixed on the flange 10; a main reducer shell 13 is fixed on a driving axle housing through bolts, a gear shaft 12 penetrates through the main reducer shell 13, the front end of the gear shaft 12 abuts against the flange 10, and a driving bevel gear 20 is arranged at the rear end of the gear shaft 12; the front bearing 14 and the middle bearing 15 are tapered roller bearings, and each tapered roller bearing comprises an inner ring, a roller and an outer ring, the inner ring of the front bearing 14 is matched with the gear shaft 12, and the outer ring of the front bearing 14 is supported on the main speed reducer shell 13; the middle bearing 15 is arranged in the bearing seat 19 opposite to the front bearing 14, the inner ring of the middle bearing 15 is arranged on the gear shaft 12, and the outer ring of the middle bearing 15 is supported on the main reducer casing 13.
The pre-tightening of the existing driving bevel gear assembly depends on a spacer bush 16 and an adjusting gasket 17, wherein the spacer bush 16 is a rigid bush usually, and the deformation is small; the adjusting shim 17 has a different thickness, between 3mm and 5 mm. Because the pre-tightening amount of the bearing is determined by the distance between the inner rings of the front bearing 14 and the middle bearing 15 when the assembly is finished, the pre-tightening amount of the two tapered roller bearings is an important control requirement when the main cone assembly is assembled, if the pre-tightening amount of the bearing is overlarge, the rotation resistance of the bevel gear is overlarge, the transmission efficiency is reduced, and the abrasion speed of the bearing is overlarge; on the contrary, the bearing has insufficient support rigidity, and the gear shaft may axially shift. Therefore, during the assembly of the main cone assembly in the axle factory, the spacer 17 of moderate thickness is generally preselected to abut against the rigid spacer 16; then the locking nut 18 is screwed, the locking nut 18 compresses the front bearing 14, and the front bearing 14 and the middle bearing 15 compress and clamp the adjusting gasket 17 and the spacer 16; after the main cone assembly is assembled, measuring the friction torque of the main cone assembly during uniform rotation, and thus reflecting the pre-tightening amount of the main cone bearing through the rotating friction torque of the driving bevel gear assembly.
However, due to manufacturing errors of parts such as the reducer housing 13, the bearing seat 19 and the drive bevel gear 20, when different main cone assembly bearings of the same model are pre-tightened, the distance between the inner ring of the front bearing 14 and the inner ring of the middle bearing 15 is different, and the difference can reach 2mm at most according to practice, which means that when the main cone assemblies are assembled, different main cone assemblies need to be matched with the rigid sleeve by using the adjusting gaskets 17 with different thicknesses. When the main cone assembly is assembled, if the friction torque is larger, parts such as a front bearing and the like need to be disassembled, and a thicker adjusting gasket needs to be replaced according to experience; otherwise, the thinner spacer is replaced. The adjusting gasket is continuously disassembled and replaced until the friction torque of the main cone assembly bearing is appropriate, and the disassembling and assembling times of one main cone assembly are generally 2-3 times. The adjustment of the inner ring spacing of the front bearing 14 and the middle bearing 15 and the adjustment between the adjusting gasket 17 and the spacer 16 require repeated disassembly and assembly and replacement of the gasket during the assembly of the main cone assembly, thereby reducing the assembly efficiency of the main cone assembly, increasing the labor intensity of assembly workers and further influencing the production efficiency of the drive axle.
Along with the increasingly strict requirements on energy conservation and emission reduction of automobiles, the requirement on the light weight of a drive axle is higher, and the requirement on the distance between the front bearing 14 and the inner ring of the middle bearing 15 of the main cone assembly is smaller. With some new drive axle designs, the inner ring spacing of the front bearing 14 and the center bearing 15 of the main cone assembly has been designed to be within 30 mm. However, at present, a corrugated sleeve produced by a steel pipe is usually adopted as the spacer 16, the corrugated sleeve is a rotary cylindrical shell structure with straight wall sections at two ends and an outward convex corrugated area at the middle part, the axial length is 30-35 mm, the wall thickness is not more than 2mm, and the pre-tightening mode of the existing main cone assembly bearing cannot meet the requirement of light weight of a drive axle.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a pretension spacer for automobile drive axle initiative bevel gear assembly for the pretension mode of solving current main cone assembly bearing can not satisfy the problem of the lightweight requirement of transaxle.
The technical scheme of the utility model is that: the pre-tightening spacer bush for the automobile drive axle driving bevel gear assembly comprises a circular pipe bush body, wherein the axial length of the circular pipe bush body is less than 30mm, an inner wall circular groove is formed in the inner wall of the circular pipe bush body, and the inner wall circular groove is perpendicular to the axial direction of the circular pipe bush body; the circular pipe sleeve is characterized in that an outer wall upper circular groove and an outer wall lower circular groove are formed in the outer wall of the circular pipe sleeve body, and the outer wall upper circular groove and the outer wall lower circular groove are respectively located on the upper side and the lower side of the outer wall of the circular pipe sleeve body.
Furthermore, the axial center of the inner wall circular groove and the axial center of the inner wall of the circular tube sleeve body are positioned on the same plane; the inner wall circular groove is an annular semicircular groove.
Further, the outer wall upper circular groove and the outer wall lower circular groove are symmetrical about a radial section of the inner wall circular groove.
Further, the axial length of the circular pipe sleeve body is 10 to 20 mm.
Further, the wall thickness of the circular pipe sleeve body is 4-6 mm.
Further, the groove depth of the inner wall circular ring groove, the outer wall upper circular ring groove and the outer wall lower circular ring groove is 1-2.5 mm.
The utility model has the advantages that:
the utility model discloses a pretension spacer for automobile drive axle initiative bevel gear assembly adopts this pretension spacer to replace existing rigidity ripple cover to come to carry out the pretension to main cone assembly bearing, because the axial length of pipe box body is less than 30cm, satisfies the requirement that the inner circle interval design of the front bearing of main cone assembly and medium bearing is within 30mm, on the outer wall the ring groove with the ring groove is used for the card respectively to establish adjusting shim under the outer wall, sets up the axle journal on the gear shaft, and the inner wall ring groove is used for seting up epaxial axle journal of gear, has improved the effect of lock nut pretension main cone assembly, can avoid the process of dismouting, change gasket repeatedly when main cone assembly assembles, directly improves the assembly efficiency of main cone assembly. The pre-tightening spacer bush can be formed by simply turning a round pipe, is suitable for industrial production and has low manufacturing cost.
Drawings
FIG. 1 is a schematic view of the internal structure of a prior art drive bevel gear assembly pre-tensioned with a rigid spacer;
fig. 2 is a three-dimensional view of a pre-tightening spacer provided in embodiment 1 of the present invention;
fig. 3 is a cross-sectional view of a pre-tightening spacer according to embodiment 1 of the present invention;
fig. 4 is a dimensional relationship diagram of a pre-tightening spacer provided in a bearing of a main cone assembly according to embodiment 1 of the present invention;
fig. 5 is a schematic structural view of a main cone assembly of a pre-tightening spacer pre-tightening drive axle provided in embodiment 1 of the present invention.
Detailed Description
The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Example 1
Referring to fig. 2 and 3, the pre-tightening spacer for the drive bevel gear assembly of the automobile drive axle comprises a circular pipe sleeve body 1, wherein the axial length of the circular pipe sleeve body 1 is 20mm, and the wall thickness of the circular pipe sleeve body 1 is 5 mm.
An inner wall circular groove 2 is formed in the inner wall of the circular pipe sleeve body 1, and the inner wall circular groove 2 is perpendicular to the axial direction of the circular pipe sleeve body 1; the axial center of the inner wall circular groove 2 and the axial center of the inner wall of the circular tube sleeve body 1 are positioned on the same plane; the inner wall circular groove 2 is an annular semicircular groove. More specifically, the projection of the radial section of the inner wall circular groove 2 is a closed circle, and the cross section of the inner wall circular groove 2 is a semicircular arc. The groove depth of the inner wall circular ring groove 2 is 1.5 mm.
The outer wall of the pipe sleeve body 1 is provided with an outer wall upper circular groove 31 and an outer wall lower circular groove 32, the outer wall upper circular groove 31 and the outer wall lower circular groove 32 are respectively located on the upper side and the lower side of the outer wall of the pipe sleeve body 1. Specifically, the outer wall upper circular groove 31 and the outer wall lower circular groove 32 are symmetrical with respect to a radial section of the inner wall circular groove 2. The groove depth of the inner wall circular groove 2, the outer wall upper circular groove 31 and the outer wall lower circular groove 32 is 1.5 mm.
Wherein, this pretension spacer forms through pipe lathe work, and the middle part car that goes at pipe cover body 1 inboard removes a semicircular ring groove and forms inner wall ring groove 2, and the car that goes at pipe cover body 1 outside removes two semicircle rings and forms ring groove 31 and outer wall lower ring groove 32 on the outer wall respectively, and ring groove 31 and outer wall lower ring groove 32 symmetry branch are in the upper and lower side of inner wall ring groove 2 on the outer wall, and its section shape is like vertical "W" of placing.
Referring to fig. 4, the pre-loaded spacer is installed between the inner race of the front bearing 14 and the inner race of the center bearing 15 without interfering with the components of the final drive housing 13, the bearing rollers, and the gear 12. The axial length H of the pre-tightening spacer is determined to be H + Δ (Δ is the compression amount of the cup-shaped spacer during installation) according to the axial distance H between the inner ring of the front bearing 14 and the inner ring of the middle bearing 15. According to the diameter D of the bottom of the inner ring of the front bearing 1411And in the center bearing 15Diameter D of the top of the ring bottom21Determining the inner diameter d of the small end of the pre-tightening spacer sleeve, and d>max(D11，D21). Other sizes can be determined according to the assembly process requirements such as nut loosening moment and the like.
Example 2
installing a pre-tightening spacer bush:
knocking outer rings of the front bearing 14 and the middle bearing 15 into the main reducer case 13;
pressing the inner ring of the middle bearing 15 to the bottom of the gear shaft 12;
the pre-tightening spacer is sleeved on the gear shaft 12, and one end of the pre-tightening spacer is in contact with the inner ring of the middle bearing 15.
Sequentially installing the inner ring of the front bearing 14, the flange 10 and the locking nut 18 in place;
pre-tightening the bearing:
slowly tightening the lock nut 18;
along with the continuous tightening of the locking nut 18, the locking nut 18 gradually compresses the flange 10 and the inner ring of the front bearing 14, and the inner ring of the front bearing 14 compresses the circular tube sleeve body 1;
and (3) tightening the locking nut 18, monitoring the rotating friction torque of the main cone assembly at the same time, and stopping tightening until the friction torque meets the requirements of the assembly process, so that the assembly of the main cone assembly is finished.
The utility model discloses a this pretension spacer can be used for the pretension of automobile drive axle owner awl assembly bearing, and especially the owner awl bearing inner circle interval is very short, and when about between 10mm ~ 20mm, this pretension spacer still is suitable for. Use the utility model provides a this pretension spacer replaces rigid ripple cover and adjusting shim, relapse the dismouting when can fundamentally avoid the assembly of main cone assembly, the problem of changing the gasket to improve assembly efficiency. Meanwhile, the shape of the pre-tightening spacer bush is convenient to process, the cost is low, and the practicability is high.
Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (6)
1. A pre-tightening spacer bush for a drive bevel gear assembly of an automobile drive axle is characterized by comprising a circular pipe bush body (1), wherein the axial length of the circular pipe bush body (1) is less than 30mm,
an inner wall circular ring groove (2) is formed in the inner wall of the circular tube sleeve body (1), and the inner wall circular ring groove (2) is perpendicular to the axial direction of the circular tube sleeve body (1);
the pipe overlaps on body (1) outer wall and is provided with under ring groove (31) and the outer wall ring groove (32) on the outer wall, on the outer wall ring groove (31) with ring groove (32) are located respectively under the outer wall upside and the downside of pipe cover body (1) outer wall.
2. The pre-tensioned spacer sleeve for an automotive transaxle drive bevel gear assembly of claim 1,
the axial center of the inner wall circular groove (2) and the axial center of the inner wall of the circular tube sleeve body (1) are positioned on the same plane;
the inner wall circular ring groove (2) is an annular semicircular groove.
3. The pre-tensioned spacer sleeve for an automotive transaxle drive bevel gear assembly of claim 1,
the outer wall upper circular ring groove (31) and the outer wall lower circular ring groove (32) are symmetrical about the radial section of the inner wall circular ring groove (2).
4. The pre-tensioned spacer sleeve for an automotive transaxle drive bevel gear assembly of claim 1,
the axial length of the circular tube sleeve body (1) is 10-20 mm.
5. The pre-tensioned spacer sleeve for an automotive transaxle drive bevel gear assembly of claim 1,
the wall thickness of the circular tube sleeve body (1) is 4-6 mm.
6. The pre-tensioned spacer sleeve for an automotive transaxle drive bevel gear assembly of claim 1,
the groove depth of the inner wall circular groove (2), the outer wall upper circular groove (31) and the outer wall lower circular groove (32) is 1-2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920519851.5U CN209892722U (en) | 2019-04-17 | 2019-04-17 | Pre-tightening spacer bush for driving bevel gear assembly of automobile drive axle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920519851.5U CN209892722U (en) | 2019-04-17 | 2019-04-17 | Pre-tightening spacer bush for driving bevel gear assembly of automobile drive axle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209892722U true CN209892722U (en) | 2020-01-03 |
Family
ID=68999166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920519851.5U Active CN209892722U (en) | 2019-04-17 | 2019-04-17 | Pre-tightening spacer bush for driving bevel gear assembly of automobile drive axle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209892722U (en) |
-
2019
- 2019-04-17 CN CN201920519851.5U patent/CN209892722U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102056752B (en) | Bearing device for driving wheels | |
| WO2013047695A1 (en) | Bearing device for wheel with built-in in-wheel motor | |
| EP3395599B1 (en) | Bogie axle system | |
| RU2657716C1 (en) | Enhanced hub assembly with the possibility to supply air for central pumping wheels in motion | |
| CN104401302B (en) | Automobile and its disk brake Automobile drive rear axle assy | |
| CN109253224B (en) | Driving axle lightweight transmission assembly | |
| CN106352024A (en) | Single-eccentric short transmission chain speed reducer | |
| CN201142618Y (en) | Gear reducer motor of hub | |
| CN209892722U (en) | Pre-tightening spacer bush for driving bevel gear assembly of automobile drive axle | |
| CN112324865B (en) | Wheel rim shell-reducing and cantilever type planetary gear structure assembly | |
| US9770981B2 (en) | System and method for unified torque transmission and rotary sealing | |
| CN102996630A (en) | Bearing unit for supporting transmission shaft and gear reducer | |
| CN209977078U (en) | Cup-shaped pre-tightening spacer bush for automobile drive axle driving bevel gear assembly | |
| CN104806659A (en) | Roller-type one-way clutch with dual-sealing structure | |
| CN105452729B (en) | Multifunctional bearing ring with enclosed groove for light-weight differential | |
| CN114396461A (en) | Industrial robot hollow cycloid speed reduction all-in-one machine | |
| CN213711749U (en) | Special worm gear speed reducer goes up and down | |
| US9205737B2 (en) | Seal body, apparatus and method | |
| CN210290637U (en) | Novel commercial inter-wheel differential assembly | |
| CN209972067U (en) | Integral type rear axle | |
| JP2013071599A (en) | Bearing device for wheel with built-in in-wheel motor | |
| CN204592077U (en) | With the roller-type one way clutch of double sealing structure | |
| CN201129363Y (en) | Non-drive wheel hub unit assembly of commercial vehicle | |
| CN107672448B (en) | Wheel hub driving device and motor vehicle | |
| CN112677759B (en) | Hub reduction gear mounting structure and hub reduction axle assembly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |